Scala XML change literal node

For now I have XML Like this:

<root>
<snippet>
  <title></title>
  <content></content>
</snippet>
<snippet>
  <title></title>
  <content></content>
</snippet>
<snippet>
  <title></title>
  <content></content>
</snippet>
.
.
.
</root>

And i wana replace n snippet example:

   xml = XML.loadFile(xmlFilePath)
    val snippets = xml \\ "root" \\ "snippet"

Now I can refer to each by snippets(1),snippets(2),snippets(3) etc.

And now how to change/replace for example snippets(5)